Control method and system based on flyback multi-stage isolation power supply, and storage medium

Abstract

The invention provides a control method and system based on a flyback multi-stage isolation power supply and a storage medium, which are applied to a flyback multi-stage isolation transistor driving power supply circuit, and the circuit generates multiple groups of isolation power supplies through a group of flyback power supply modules and at least two groups of isolation power supply topology modules. And the use number of components is greatly reduced. According to the invention, the input power supply voltage of the flyback power supply module can be adjusted according to the total voltage required by the power supply load; according to the grading turn ratio of the isolated power supply topology module, the conduction condition of a topology analog switch of the isolated power supply topology module is controlled, and a plurality of isolated power supplies meeting the power supply voltage required by the power supply load are combined and output; the isolation power supply is applied to an isolation circuit with fewer core elements, so that the output of a plurality of groups of isolation power supplies is realized, and the integration level and portability of the isolation power supply are improved.

Description

Technical Field

[0001] The present invention relates to the field of isolated power supply control, and more specifically, to a control method, system and storage medium based on a flyback multi-stage isolated power supply. Background Art

[0002] In today's era, the new energy industry is developing rapidly and has become a key development direction in the global energy field. Among the many key equipment in the new energy industry, IGBT single tubes and silicon carbide single tubes are used as core power devices and are widely used in various power electronic equipment, such as on-board chargers for new energy vehicles, photovoltaic inverters, wind power converters, etc. During the operation of these devices, in order to ensure that the transistors can work stably, efficiently and accurately, there are a large number of strict requirements for transistor isolation drive power supplies.

[0003] However, the existing transistor isolation drive power technology has many defects that are difficult to ignore. On the one hand, traditional technology often requires the use of a large number of components when implementing multiple sets of isolated drive power supplies, which not only greatly increases the production cost of the equipment, but also makes the complexity of the entire power system rise sharply, increasing the difficulty of quality control in the production process and the subsequent maintenance costs. On the other hand, the use of a large number of components makes PCB layout and wiring extremely difficult, requiring more space, making it difficult to reduce the overall size of the equipment, and severely restricting the integration and portability. In application scenarios with high requirements for space and portability, the limitations of traditional technology become more and more obvious. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a control method, system and storage medium based on a flyback multi-stage isolated power supply, which is applied to a flyback multi-stage isolated transistor driving power supply circuit, wherein the circuit generates multiple groups of isolated power supplies through a group of flyback power supply modules and at least two groups of isolated power supply topology modules, which greatly reduces the number of components used. The present invention can adjust the input power supply voltage of the flyback power supply module according to the total voltage required by the power supply load; and then control the conduction of the topological analog switch of the isolated power supply topology module according to the graded turns ratio of the isolated power supply topology module, so as to combine and output multiple isolated power supplies that meet the power supply voltage required by the power supply load; the present invention is applied to an isolation circuit with fewer core components to realize the output of multiple groups of isolated power supplies, thereby improving the integration and portability of the isolated power supply.

[0005] A first aspect of the present invention provides a control method based on a flyback multi-stage isolated power supply, the method comprising: Acquiring a first voltage information sequence; Determining first input voltage information according to the first voltage information sequence; Configure the power supply voltage of the flyback power supply module according to the first input voltage information; Determining a hierarchical voltage information sequence according to the first input voltage information; A first topology analog switch is switched according to the first voltage information sequence and the hierarchical voltage information sequence.

[0006] In this solution, the first input voltage information is determined according to the first voltage information sequence, specifically: Determining first boundary information and second boundary information according to the first voltage information sequence; According to the first boundary information, and in accordance with a preset voltage and calculation strategy, obtaining first voltage and information; Determining whether the first boundary information is greater than the second boundary information; If yes, setting the first input voltage information according to the first voltage and information; If not, calculating the average of the first boundary information and the second boundary information to obtain third boundary information; According to the third boundary information, and in accordance with a preset voltage and calculation strategy, a second voltage and information is obtained; Determining whether the second voltage and information are greater than the first voltage and information; If yes, setting the second boundary information according to the third boundary information; If not, the first boundary information is set according to the third boundary information, and the first voltage and information are updated according to the second voltage and information.

[0007] In this solution, the first boundary information and the second boundary information are determined according to the first voltage information sequence, specifically: determining second voltage information according to the first voltage information sequence; According to the second voltage information, setting the second boundary information; Obtaining a preset classification threshold; Calculating a ratio of the second voltage information to the classification threshold rounded down to obtain first ratio information; The first boundary information is set according to the first ratio information.

[0008] In this solution, the voltage and calculation strategy are specifically as follows: Obtaining first unit voltage information; Selecting the first voltage information in the first voltage information sequence in sequence according to a preset order; Calculate a rounded-up ratio of the first voltage information to the first unit voltage information to obtain second ratio information; Obtaining third voltage information according to the product of the second ratio information and the first unit voltage information; The third voltage information is accumulated sequentially to obtain voltage sum information.

[0009] In this solution, the step of determining the hierarchical voltage information sequence according to the first input voltage information is specifically as follows: Obtaining first graded turns ratio information, first intermediate graded turns ratio information, second intermediate graded turns ratio information, and second graded turns ratio information; Determining first hierarchical voltage information according to first input voltage information and the first hierarchical turns ratio information; Determining first intermediate hierarchical voltage information according to the first hierarchical voltage information and the first intermediate hierarchical turns ratio information; determining second intermediate grading voltage information according to the first intermediate grading voltage information and the second intermediate grading turns ratio information; determining second grading voltage information according to the second intermediate grading voltage information and the second grading turns ratio information; A gradation voltage information sequence is obtained according to the first gradation voltage information, the first intermediate gradation voltage information, the second intermediate gradation voltage information and the second gradation voltage information.

[0010] In this solution, switching the first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence is specifically: Sequentially extracting first voltage information in the first voltage information sequence to obtain fourth voltage information; According to the fourth voltage information, in accordance with a preset comparison order, the fourth voltage information is sequentially compared with the hierarchical voltages of the hierarchical voltage information sequence; Determining whether the fourth voltage information is greater than the classification voltage; If yes, disconnect the conduction switch of the isolated power supply topology module corresponding to the graded voltage; If not, calculating the difference between the fourth voltage information and the next level of the graded voltage of the graded voltage, and using it to update the fourth voltage information; Determining whether the fourth voltage information exceeds 0; If yes, continue to perform the step of comparing the fourth voltage information with the graded voltage information sequence; If not, the first voltage information in the first voltage information sequence is extracted to obtain the fourth voltage information until all the first voltage information in the first voltage information sequence is compared.

[0011] A second aspect of the present invention provides a control system based on a flyback multi-stage isolated power supply, including a control method program based on a flyback multi-stage isolated power supply, wherein the control method program based on the flyback multi-stage isolated power supply implements the following steps when executed by the processor: Acquiring a first voltage information sequence; Determining first input voltage information according to the first voltage information sequence; Configure the power supply voltage of the flyback power supply module according to the first input voltage information; Determining a hierarchical voltage information sequence according to the first input voltage information; A first topology analog switch is switched according to the first voltage information sequence and the hierarchical voltage information sequence.

[0012] In this solution, the first input voltage information is determined according to the first voltage information sequence, specifically: Determining first boundary information and second boundary information according to the first voltage information sequence; According to the first boundary information, and in accordance with a preset voltage and calculation strategy, obtaining first voltage and information; Determining whether the first boundary information is greater than the second boundary information; If yes, setting the first input voltage information according to the first voltage and information; If not, calculating the average of the first boundary information and the second boundary information to obtain third boundary information; According to the third boundary information, and in accordance with a preset voltage and calculation strategy, a second voltage and information is obtained; Determining whether the second voltage and information are greater than the first voltage and information; If yes, setting the second boundary information according to the third boundary information; If not, the first boundary information is set according to the third boundary information, and the first voltage and information are updated according to the second voltage and information.

[0013] In this solution, switching the first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence is specifically: Sequentially extracting first voltage information in the first voltage information sequence to obtain fourth voltage information; According to the fourth voltage information, in accordance with a preset comparison order, the fourth voltage information is sequentially compared with the hierarchical voltages of the hierarchical voltage information sequence; Determining whether the fourth voltage information is greater than the classification voltage; If yes, disconnect the conduction switch of the isolated power supply topology module corresponding to the graded voltage; If not, calculating the difference between the fourth voltage information and the next level of the graded voltage of the graded voltage, and using it to update the fourth voltage information; Determining whether the fourth voltage information exceeds 0; If yes, continue to perform the step of comparing the fourth voltage information with the graded voltage information sequence; If not, the first voltage information in the first voltage information sequence is extracted to obtain the fourth voltage information until all the first voltage information in the first voltage information sequence is compared.

[0014] A third aspect of the present invention provides a computer-readable storage medium, which includes a control method program based on a flyback multi-stage isolated power supply. When the control method program based on a flyback multi-stage isolated power supply is executed by a processor, the steps of the control method based on a flyback multi-stage isolated power supply as described in any one of the above items are implemented.

[0015] The present invention provides a control method, system and storage medium based on a flyback multi-stage isolated power supply, which is applied to a flyback multi-stage isolated transistor driving power supply circuit, wherein the circuit generates multiple groups of isolated power supplies through a group of flyback power supply modules and at least two groups of isolated power supply topology modules, which greatly reduces the number of components used. The present invention can adjust the input power supply voltage of the flyback power supply module according to the total voltage required by the power supply load; and then control the conduction of the topological analog switch of the isolated power supply topology module according to the graded turns ratio of the isolated power supply topology module, so as to combine and output multiple isolated power supplies that meet the power supply voltage required by the power supply load; the present invention is applied to an isolation circuit with fewer core components to realize the output of multiple groups of isolated power supplies, thereby improving the integration and portability of the isolated power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope.

[0017] Figure 1 A connection topology diagram of a flyback multi-stage isolation transistor drive power supply circuit is shown; Figure 2 A flow chart showing a control method based on a flyback multi-stage isolated power supply of the present invention is shown; Figure 3 A flowchart for confirming the first input voltage information provided by an embodiment of the present invention is shown; Figure 4 A switching flow chart of a first topology analog switch provided by an embodiment of the present invention is shown; Figure 5The block diagram of the control system based on the flyback multi-level isolated power supply of the present invention is shown. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are explicitly defined in this way.

[0020] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the method of the embodiment of the present invention are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a step or several steps can be removed from these processes.

[0021] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0022] Figure 1 The invention shows a connection topology diagram of a flyback multi-stage isolation transistor driving power supply circuit.

[0023] like Figure 1 As shown, a flyback type multi-stage isolation transistor driving power supply circuit includes: A set of flyback power supply modules and at least two sets of isolated power supply topology modules; The flyback power supply module uses a PWM chip as a flyback power supply, and then drives the power supply through at least one transistor, and is connected to the primary of the transformer; The isolated power supply topology module is a mutually isolated driving power supply composed of transformer secondary.

[0024] It should be noted that the flyback power supply module 101 generates a PWM signal from a PWM chip, and the transistor controls the voltage signal according to the PWM signal, and combines the power supply VBUS+ / VBUS- to form a flyback power supply, and then connects the flyback power supply voltage to the primary of the transformer. The isolation power supply topology module is set to a multi-level isolation power supply topology, in which each level of the driving power supply includes at least two groups of topology modules; for example, Figure 1 The first primary topology 1021, the second primary topology 1022, the first secondary topology 1031, the second secondary topology 1032 and the third secondary topology 1033 in FIG. That is, the isolated power supply topology is formed by the secondary of the transformer, wherein the secondary of the transformer is at least 2 windings, such as Figure 1 As shown in the figure, the primary topology includes 2 windings and the secondary topology includes 3 windings. Therefore, as long as the lower magnetic core of the transformer skeleton is not saturated, multiple isolated drive power supplies can be generated through the multi-level topology. In practical applications, the number of windings is inversely proportional to the turns ratio, that is, the more windings there are, the smaller the turns ratio of each secondary winding is; for example, when there are 2 sets of windings, the secondary turns ratio is set to 2:1. In addition, for the convenience of expression, the isolated power supply circuit is used below to refer to the flyback multi-level isolated transistor drive power supply circuit.

[0025] Figure 2 The flowchart of the control method of the flyback multi-stage isolated power supply of the present invention is shown.

[0026] like Figure 2 As shown, the first aspect of the present invention discloses a control method based on a flyback multi-stage isolated power supply, the method comprising: S202, obtaining a first voltage information sequence; S204, determining first input voltage information according to the first voltage information sequence; S206, configuring the power supply voltage of the flyback power supply module according to the first input voltage information; S208, determining a hierarchical voltage information sequence according to the first input voltage information; S210: Switch a first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence.

[0027] It should be noted that the first voltage information is the power supply voltage value required to power the load; the first voltage information sequence is a sequence composed of the power supply voltage values ​​required for the load provided with power by the same group of isolated power supply circuits; the first input voltage information is the input power supply voltage value of the isolated power supply circuit; the graded voltage information sequence is the output voltage value of each level of the isolated power supply topology of the isolated power supply circuit; the first topology analog switch is the on-switch of the isolated power supply topology, which is used to form the power supply voltage required to power the load.

[0028] In this embodiment, according to the voltage requirement of the power supply load, the input power supply voltage value of the isolated power supply circuit is configured, and then combined with the switching status of each level of the isolated power supply topology module of the isolated power supply circuit, the conduction status of the isolated power supply topology module is switched. First, the power supply voltage required for each power supply load is collected to form a voltage value sequence, that is, a first voltage information sequence; wherein the above-mentioned power supply load is powered by the isolated power supply generated by the same group of isolated power supply circuits. Secondly, in combination with the circuit configuration of the isolated power supply circuit, the input power supply voltage of the isolated power supply circuit is obtained according to the set input voltage calculation method, wherein not only the isolated power supply generated by the input power supply voltage can meet the power supply requirements of all power supply loads, but also the minimum voltage value when the power supply requirements are met. Then, according to the circuit configuration of the isolated power supply circuit, combined with the input power supply voltage of the configured isolated power supply circuit, the output voltage value of each level of the isolated power supply topology is obtained, which is used to form a hierarchical voltage information sequence. Finally, according to the size of the power supply voltage value required by the power supply load and the output voltage value of each level of the isolated power supply topology, the topological analog switches of the isolated power supply topology at each level are switched, that is, the conduction status of the isolated power supply topology is switched, which is used to combine the power supply voltage required by the power supply load and the power supply isolated from each other.

[0029] Figure 3 A flow chart for confirming the first input voltage information provided by an embodiment of the present invention is shown.

[0030] According to an embodiment of the present invention, Figure 3 As shown, the first input voltage information is determined according to the first voltage information sequence, specifically: S302, determining first boundary information and second boundary information according to the first voltage information sequence; S304, obtaining first voltage and information according to the first boundary information and a preset voltage and calculation strategy; S306, determining whether the first boundary information is greater than the second boundary information; S308, if yes, setting the first input voltage information according to the first voltage and information; S310, if not, calculating the average of the first boundary information and the second boundary information to obtain third boundary information; S312, obtaining second voltage and information according to the third boundary information and a preset voltage and calculation strategy; S314, determining whether the second voltage and information are greater than the first voltage and information; S316, if yes, setting the second boundary information according to the third boundary information; S318: If not, setting the first boundary information according to the third boundary information, and updating the first voltage and information according to the second voltage and information.

[0031] It should be noted that the first boundary information is the lower boundary of the minimum graded voltage selection range in the process of calculating the first input voltage information; the second boundary information is the upper boundary of the minimum graded voltage selection range in the process of calculating the first input voltage information; the first voltage sum information is the minimum value of the sum of the power supply voltage values ​​required by the power supply load in the process of calculating the first input voltage information; the second voltage sum information is the sum of the power supply voltage values ​​required by the power supply load obtained by calculating according to any minimum graded voltage in the process of calculating the first input voltage information; the minimum graded voltage is the minimum value of the graded voltage required to be provided by the same group of isolated power supply circuits based on the power supply voltage value required by the power supply load.

[0032] In this embodiment, the minimum input power supply voltage value that meets the power supply requirements of the isolated power supply circuit is obtained through a preset voltage value search strategy. First, the upper and lower boundaries of the minimum graded voltage are determined according to the power supply voltage value required by the power supply load, because the value range is limited. Then, the voltage value corresponding to the lower boundary is used as the minimum graded voltage value, and the minimum value of the sum of the power supply voltage values ​​required by the power supply load is obtained according to the preset voltage and calculation strategy, which is recorded as the first voltage and information. Finally, the following loop judgment process is executed: Determine whether the first boundary information is greater than the second boundary information. If the first boundary information is greater than the second boundary information, it means that the value boundaries have overlapped, that is, the value range is missing. At this time, the first input voltage information is set according to the first voltage and information, and the above-mentioned loop judgment process is terminated. If the first boundary information is not greater than the second boundary information, the minimum graded voltage value is selected from the value range included in the upper and lower boundaries; as an implementation method, the mean of the first boundary information and the second boundary information, that is, the third boundary information, is calculated as the minimum graded voltage value. Then, according to the voltage value corresponding to the third boundary information, according to the preset voltage and calculation strategy, the calculated value of the sum of the supply voltage values ​​is obtained, that is, the second voltage and information, which is used to compare the size relationship between the second voltage and information and the first voltage and information. When the second voltage and information is greater than the first voltage and information, it means that the sum of the supply voltages calculated according to the voltage value corresponding to the third boundary is greater than the previous calculated value. At this time, the second boundary information is adjusted downward according to the third boundary information. When the second voltage and information is not greater than the first voltage and information, it means that the total power supply voltage calculated according to the voltage value corresponding to the third boundary is smaller than the previously calculated value. At this time, the first voltage and information is first updated according to the second voltage and information to save the smaller value of the power supply voltage, and then the second boundary information is adjusted upward according to the third boundary information. Finally, the above-mentioned loop judgment process is executed again according to the size relationship between the first boundary information and the second boundary information.

[0033] According to an embodiment of the present invention, determining the first boundary information and the second boundary information according to the first voltage information sequence is specifically: determining second voltage information according to the first voltage information sequence; According to the second voltage information, setting the second boundary information; Obtaining a preset classification threshold; Calculating a ratio of the second voltage information to the classification threshold rounded down to obtain first ratio information; The first boundary information is set according to the first ratio information.

[0034] It should be noted that the second voltage information is the maximum value in the first voltage information sequence; the grading threshold is the number of grades of the isolated power supply topology in the isolated power supply circuit. In this embodiment, the first boundary information and the second boundary information are set according to the voltage requirement of the power supply load and the configuration of the isolated power supply circuit. First, the maximum voltage, that is, the second voltage information, is extracted from the first voltage information sequence, and then the upper boundary, that is, the second boundary information, is set according to the second voltage information. Then, the ratio of the second voltage information to the grading threshold is calculated, and the result of rounding the ratio down is used as the first ratio information; then the lower boundary, that is, the first boundary information, is set according to the first ratio information.

[0035] According to an embodiment of the present invention, the voltage and calculation strategy are specifically: Obtaining first unit voltage information; Selecting the first voltage information in the first voltage information sequence in sequence according to a preset order; Calculate a rounded-up ratio of the first voltage information to the first unit voltage information to obtain second ratio information; Obtaining third voltage information according to the product of the second ratio information and the first unit voltage information; The third voltage information is accumulated sequentially to obtain voltage sum information.

[0036] It should be noted that the first unit voltage information is the minimum graded voltage required to be provided by the isolated power supply circuit when calculating the voltage sum, and at least includes the voltage values ​​corresponding to the first boundary information and the third boundary information; the third voltage information is the voltage value that can be provided by the isolated power supply circuit when the power supply load is the first voltage information; the voltage sum information is the sum of the voltages that the isolated power supply circuit needs to provide when the first unit voltage information is the minimum graded voltage. In this embodiment, first, according to the order of the first voltage information sequence, the first voltage information is selected in sequence, and the ratio with a unit voltage information is calculated, and the result of rounding up the ratio is used as the second ratio information. Then, the product of the second ratio information and the first unit voltage information is calculated to obtain the third voltage information, which is used to represent the minimum power supply voltage value that the isolated power supply circuit meets the power supply demand of the power supply load according to the current minimum graded voltage. Finally, the sum of the third voltage information available to each power supply load is calculated to obtain the voltage sum information.

[0037] According to an embodiment of the present invention, determining the hierarchical voltage information sequence according to the first input voltage information is specifically: Obtaining first graded turns ratio information, first intermediate graded turns ratio information, second intermediate graded turns ratio information, and second graded turns ratio information; Determining first hierarchical voltage information according to first input voltage information and the first hierarchical turns ratio information; Determining first intermediate hierarchical voltage information according to the first hierarchical voltage information and the first intermediate hierarchical turns ratio information; determining second intermediate grading voltage information according to the first intermediate grading voltage information and the second intermediate grading turns ratio information; determining second grading voltage information according to the second intermediate grading voltage information and the second grading turns ratio information; A gradation voltage information sequence is obtained according to the first gradation voltage information, the first intermediate gradation voltage information, the second intermediate gradation voltage information and the second gradation voltage information.

[0038] It should be noted that the first graded turns ratio information is the number of grades of the first-level graded circuit in the isolated power supply circuit; the second graded turns ratio information is the number of grades of the last-level graded circuit in the isolated power supply circuit; the first intermediate graded turns ratio information and the second intermediate graded turns ratio information are the number of grades of the intermediate graded circuit located between the first-level graded circuit and the last-level graded circuit in the isolated power supply circuit, wherein the first intermediate graded circuit is located at the front stage of the second intermediate graded circuit.

[0039] In this embodiment, a calculation process of the graded voltage is provided. In practical applications, in order to facilitate the control of the graded voltage range and combination, the turns ratio of each level will be set to the same value, usually 2. For example, assuming that the input power supply voltage value of the isolated power supply circuit is 32 units, the isolated power supply circuit is provided with a 5-level isolated power supply topology and the graded turns ratio of each level topology is 2, the first level voltage is 16 units, the second level voltage is 8 units, the third level voltage is 4 units, the fourth level voltage is 2 units, and the fifth level voltage is 1 unit. Therefore, the graded voltage information sequence is [16,8,4,2,1].

[0040] Figure 4 A switching flow chart of a first topology analog switch provided by an embodiment of the present invention is shown.

[0041] According to an embodiment of the present invention, Figure 4 As shown, the switching of the first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence is specifically: S402, sequentially extracting first voltage information in the first voltage information sequence to obtain fourth voltage information; S404, comparing the fourth voltage information with the graded voltages of the graded voltage information sequence in sequence according to a preset comparison order; S406, determining whether the fourth voltage information is greater than the classification voltage; S408, if yes, disconnecting the conduction switch of the isolated power supply topology module corresponding to the graded voltage; S410, if not, calculating a difference between the fourth voltage information and a subsequent level of the level voltage of the level voltage, and using the difference to update the fourth voltage information; S412, determining whether the fourth voltage information exceeds 0; S402, if yes, then continue to perform the step of comparing the fourth voltage information with the graded voltage information sequence; S414: If not, extract the first voltage information in the first voltage information sequence to obtain fourth voltage information until all first voltage information in the first voltage information sequence are compared.

[0042] It should be noted that the fourth voltage information is a voltage calculation value in the calculation process of the topology analog switch switching for the power supply load. In this embodiment, the isolated power supply is configured for the power supply load in turn by switching the on switch of the isolated power supply topology module. As an implementation method, the first voltage information is extracted from the first voltage information sequence in turn according to the voltage value required by the power supply load to set the fourth voltage information. First, according to the graded voltage information sequence, the graded voltage is obtained in ascending order for comparison with the fourth voltage information. When the fourth voltage information is greater than the above-mentioned graded voltage, the on switch of the isolated power supply topology module corresponding to the graded voltage is disconnected to indicate that the topological voltage division is not performed through the transformer. When the fourth voltage information is not greater than the above-mentioned graded voltage, the conduction state of the conduction switch of the isolated power supply topology module corresponding to the graded voltage is maintained, and the difference between the fourth voltage information and the graded voltage of the next level of the graded voltage is calculated to update the fourth voltage information; for example, the fourth voltage information is 5, the current graded voltage is 8, and the graded voltage of the next level is 4. Since the fourth voltage information is less than the current graded voltage, at this time, the difference between the fourth voltage information and the graded voltage of the next level is calculated (5-4=1), and the fourth voltage information is updated to 1. Then, it is determined whether the fourth voltage information exceeds 0; if the fourth voltage information exceeds 0, it means that the isolated power supply needs to be continued to be configured for the power supply load, and the comparison step of the fourth voltage information and the graded voltage information sequence is continued; if the fourth voltage information does not exceed 0, it means that the isolated power supply configuration of the current power supply load is completed, and the isolated power supply is configured for the next power supply load.

[0043] It is worth mentioning that it also includes: Acquiring a second voltage information sequence; Calculating the differences between the elements of the first voltage sequence and the second voltage information sequence in sequence order to obtain a first difference sequence; Determining whether the first difference values ​​in the first difference value sequence are all greater than a preset difference value threshold; If so, the duty cycle parameter of the PWM chip is lowered.

[0044] It should be noted that the second voltage information is the power supply voltage value obtained by the power supply load; the second voltage information sequence is a voltage sequence composed of the second voltage information. In this embodiment, the operating parameters of the PWM chip are adjusted by the difference between the power supply value and the power demand value of the power supply load to achieve fine-tuning of the flyback voltage of the isolated power supply circuit, and the safety of the circuit operation is improved by lowering the voltage. When the difference between the power supply value and the power demand value of the power supply load is greater than the preset difference threshold, the effect of fine-tuning the flyback voltage of the isolated power supply circuit can be achieved by lowering the operating parameters of the PWM.

[0045] It is worth mentioning that it also includes: Acquiring first current information; Determining whether the first current information exceeds a preset current threshold; If so, the first topology analog switch of the first stage is turned off.

[0046] It should be noted that the first current information is the operating current of the flyback power module in the isolated power circuit. When the current is too high, there is a problem of burning the transistor in the flyback power module. Therefore, in this embodiment, the safety of the isolated power circuit is improved by monitoring the current.

[0047] It is worth mentioning that it also includes: Acquiring first current information; Obtaining first power information according to the first current information and the first input voltage information; Determining whether the first power information exceeds a preset power threshold; If so, the first input voltage information is lowered or the duty cycle parameter of the PWM chip is lowered.

[0048] It should be noted that the operating power of the isolated power supply circuit, i.e., the first power information, is calculated based on the operating current in the flyback power supply module and the input power supply voltage. In this embodiment, when the first power information exceeds the preset power threshold, the operating power of the isolated power supply circuit is controlled by reducing the input voltage or lowering the operating parameters of the PWM chip, thereby improving the safety of the isolated power supply circuit.

[0049] Figure 5 The block diagram of the control system based on the flyback multi-level isolated power supply of the present invention is shown.

[0050] like Figure 5 As shown, the second aspect of the present invention discloses a control system 5 based on a flyback multi-stage isolated power supply, including a memory 51 and a processor 52, wherein the memory includes a control method program based on a flyback multi-stage isolated power supply, and the control method program based on a flyback multi-stage isolated power supply implements the following steps when executed by the processor: Acquiring a first voltage information sequence; Determining first input voltage information according to the first voltage information sequence; Configure the power supply voltage of the flyback power supply module according to the first input voltage information; Determining a hierarchical voltage information sequence according to the first input voltage information; A first topology analog switch is switched according to the first voltage information sequence and the hierarchical voltage information sequence.

[0051] It should be noted that the first voltage information is the power supply voltage value required to power the load; the first voltage information sequence is a sequence composed of the power supply voltage values ​​required for the load provided with power by the same group of isolated power supply circuits; the first input voltage information is the input power supply voltage value of the isolated power supply circuit; the graded voltage information sequence is the output voltage value of each level of the isolated power supply topology of the isolated power supply circuit; the first topology analog switch is the on-switch of the isolated power supply topology, which is used to form the power supply voltage required to power the load.

[0052] In this embodiment, according to the voltage requirement of the power supply load, the input power supply voltage value of the isolated power supply circuit is configured, and then combined with the switching status of each level of the isolated power supply topology module of the isolated power supply circuit, the conduction status of the isolated power supply topology module is switched. First, the power supply voltage required for each power supply load is collected to form a voltage value sequence, that is, a first voltage information sequence; wherein the above-mentioned power supply load is powered by the isolated power supply generated by the same group of isolated power supply circuits. Secondly, in combination with the circuit configuration of the isolated power supply circuit, the input power supply voltage of the isolated power supply circuit is obtained according to the set input voltage calculation method, wherein not only the isolated power supply generated by the input power supply voltage can meet the power supply requirements of all power supply loads, but also the minimum voltage value when the power supply requirements are met. Then, according to the circuit configuration of the isolated power supply circuit, combined with the input power supply voltage of the configured isolated power supply circuit, the output voltage value of each level of the isolated power supply topology is obtained, which is used to form a hierarchical voltage information sequence. Finally, according to the size of the power supply voltage value required by the power supply load and the output voltage value of each level of the isolated power supply topology, the topological analog switches of the isolated power supply topology at each level are switched, that is, the conduction status of the isolated power supply topology is switched, which is used to combine the power supply voltage required by the power supply load and the power supply isolated from each other.

[0053] According to an embodiment of the present invention, determining the first input voltage information according to the first voltage information sequence is specifically: Determining first boundary information and second boundary information according to the first voltage information sequence; According to the first boundary information, and in accordance with a preset voltage and calculation strategy, obtaining first voltage and information; Determining whether the first boundary information is greater than the second boundary information; If yes, setting the first input voltage information according to the first voltage and information; If not, calculating the average of the first boundary information and the second boundary information to obtain third boundary information; According to the third boundary information, and in accordance with a preset voltage and calculation strategy, a second voltage and information is obtained; Determining whether the second voltage and information are greater than the first voltage and information; If yes, setting the second boundary information according to the third boundary information; If not, the first boundary information is set according to the third boundary information, and the first voltage and information are updated according to the second voltage and information.

[0054] It should be noted that the first boundary information is the lower boundary of the minimum graded voltage selection range in the process of calculating the first input voltage information; the second boundary information is the upper boundary of the minimum graded voltage selection range in the process of calculating the first input voltage information; the first voltage sum information is the minimum value of the sum of the power supply voltage values ​​required by the power supply load in the process of calculating the first input voltage information; the second voltage sum information is the sum of the power supply voltage values ​​required by the power supply load obtained by calculating according to any minimum graded voltage in the process of calculating the first input voltage information; the minimum graded voltage is the minimum value of the graded voltage required to be provided by the same group of isolated power supply circuits based on the power supply voltage value required by the power supply load.

[0055] In this embodiment, the minimum input power supply voltage value that meets the power supply requirements of the isolated power supply circuit is obtained through a preset voltage value search strategy. First, the upper and lower boundaries of the minimum graded voltage are determined according to the power supply voltage value required by the power supply load, because the value range is limited. Then, the voltage value corresponding to the lower boundary is used as the minimum graded voltage value, and the minimum value of the sum of the power supply voltage values ​​required by the power supply load is obtained according to the preset voltage and calculation strategy, which is recorded as the first voltage and information. Finally, the following loop judgment process is executed: Determine whether the first boundary information is greater than the second boundary information. If the first boundary information is greater than the second boundary information, it means that the value boundaries have overlapped, that is, the value range is missing. At this time, the first input voltage information is set according to the first voltage and information, and the above-mentioned loop judgment process is terminated. If the first boundary information is not greater than the second boundary information, the minimum graded voltage value is selected from the value range included in the upper and lower boundaries; as an implementation method, the mean of the first boundary information and the second boundary information, that is, the third boundary information, is calculated as the minimum graded voltage value. Then, according to the voltage value corresponding to the third boundary information, according to the preset voltage and calculation strategy, the calculated value of the sum of the supply voltage values ​​is obtained, that is, the second voltage and information, which is used to compare the size relationship between the second voltage and information and the first voltage and information. When the second voltage and information is greater than the first voltage and information, it means that the sum of the supply voltages calculated according to the voltage value corresponding to the third boundary is greater than the previous calculated value. At this time, the second boundary information is adjusted downward according to the third boundary information. When the second voltage and information is not greater than the first voltage and information, it means that the total power supply voltage calculated according to the voltage value corresponding to the third boundary is smaller than the previously calculated value. At this time, the first voltage and information is first updated according to the second voltage and information to save the smaller value of the power supply voltage, and then the second boundary information is adjusted upward according to the third boundary information. Finally, the above-mentioned loop judgment process is executed again according to the size relationship between the first boundary information and the second boundary information.

[0056] According to an embodiment of the present invention, determining the first boundary information and the second boundary information according to the first voltage information sequence is specifically: determining second voltage information according to the first voltage information sequence; According to the second voltage information, setting the second boundary information; Obtaining a preset classification threshold; Calculating a ratio of the second voltage information to the classification threshold rounded down to obtain first ratio information; The first boundary information is set according to the first ratio information.

[0057] It should be noted that the second voltage information is the maximum value in the first voltage information sequence; the grading threshold is the number of grades of the isolated power supply topology in the isolated power supply circuit. In this embodiment, the first boundary information and the second boundary information are set according to the voltage requirement of the power supply load and the configuration of the isolated power supply circuit. First, the maximum voltage, that is, the second voltage information, is extracted from the first voltage information sequence, and then the upper boundary, that is, the second boundary information, is set according to the second voltage information. Then, the ratio of the second voltage information to the grading threshold is calculated, and the result of rounding the ratio down is used as the first ratio information; then the lower boundary, that is, the first boundary information, is set according to the first ratio information.

[0058] According to an embodiment of the present invention, the voltage and calculation strategy are specifically: Obtaining first unit voltage information; Selecting the first voltage information in the first voltage information sequence in sequence according to a preset order; Calculate a rounded-up ratio of the first voltage information to the first unit voltage information to obtain second ratio information; Obtaining third voltage information according to the product of the second ratio information and the first unit voltage information; The third voltage information is accumulated sequentially to obtain voltage sum information.

[0059] It should be noted that the first unit voltage information is the minimum graded voltage required to be provided by the isolated power supply circuit when calculating the voltage sum, and at least includes the voltage values ​​corresponding to the first boundary information and the third boundary information; the third voltage information is the voltage value that can be provided by the isolated power supply circuit when the power supply load is the first voltage information; the voltage sum information is the sum of the voltages that the isolated power supply circuit needs to provide when the first unit voltage information is the minimum graded voltage. In this embodiment, first, according to the order of the first voltage information sequence, the first voltage information is selected in sequence, and the ratio with a unit voltage information is calculated, and the result of rounding up the ratio is used as the second ratio information. Then, the product of the second ratio information and the first unit voltage information is calculated to obtain the third voltage information, which is used to represent the minimum power supply voltage value that the isolated power supply circuit meets the power supply demand of the power supply load according to the current minimum graded voltage. Finally, the sum of the third voltage information available to each power supply load is calculated to obtain the voltage sum information.

[0060] According to an embodiment of the present invention, determining the hierarchical voltage information sequence according to the first input voltage information is specifically: Obtaining first graded turns ratio information, first intermediate graded turns ratio information, second intermediate graded turns ratio information, and second graded turns ratio information; Determining first hierarchical voltage information according to first input voltage information and the first hierarchical turns ratio information; Determining first intermediate hierarchical voltage information according to the first hierarchical voltage information and the first intermediate hierarchical turns ratio information; determining second intermediate grading voltage information according to the first intermediate grading voltage information and the second intermediate grading turns ratio information; determining second grading voltage information according to the second intermediate grading voltage information and the second grading turns ratio information; A gradation voltage information sequence is obtained according to the first gradation voltage information, the first intermediate gradation voltage information, the second intermediate gradation voltage information and the second gradation voltage information.

[0061] It should be noted that the first graded turns ratio information is the number of grades of the first-level graded circuit in the isolated power supply circuit; the second graded turns ratio information is the number of grades of the last-level graded circuit in the isolated power supply circuit; the first intermediate graded turns ratio information and the second intermediate graded turns ratio information are the number of grades of the intermediate graded circuit located between the first-level graded circuit and the last-level graded circuit in the isolated power supply circuit, wherein the first intermediate graded circuit is located at the front stage of the second intermediate graded circuit.

[0062] In this embodiment, a calculation process of the graded voltage is provided. In practical applications, in order to facilitate the control of the graded voltage range and combination, the turns ratio of each level will be set to the same value, usually 2. For example, assuming that the input power supply voltage value of the isolated power supply circuit is 32 units, the isolated power supply circuit is provided with a 5-level isolated power supply topology and the graded turns ratio of each level topology is 2, the first level voltage is 16 units, the second level voltage is 8 units, the third level voltage is 4 units, the fourth level voltage is 2 units, and the fifth level voltage is 1 unit. Therefore, the graded voltage information sequence is [16,8,4,2,1].

[0063] According to an embodiment of the present invention, switching the first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence is specifically: Sequentially extracting first voltage information in the first voltage information sequence to obtain fourth voltage information; According to the fourth voltage information, in accordance with a preset comparison order, the fourth voltage information is sequentially compared with the hierarchical voltages of the hierarchical voltage information sequence; Determining whether the fourth voltage information is greater than the classification voltage; If yes, disconnect the conduction switch of the isolated power supply topology module corresponding to the graded voltage; If not, calculating the difference between the fourth voltage information and the next level of the graded voltage of the graded voltage, and using it to update the fourth voltage information; Determining whether the fourth voltage information exceeds 0; If yes, continue to perform the step of comparing the fourth voltage information with the graded voltage information sequence; If not, the first voltage information in the first voltage information sequence is extracted to obtain the fourth voltage information until all the first voltage information in the first voltage information sequence is compared.

[0064] It should be noted that the fourth voltage information is a voltage calculation value in the calculation process of the topology analog switch switching for the power supply load. In this embodiment, the isolated power supply is configured for the power supply load in turn by switching the on switch of the isolated power supply topology module. As an implementation method, the first voltage information is extracted from the first voltage information sequence in turn according to the voltage value required by the power supply load to set the fourth voltage information. First, according to the graded voltage information sequence, the graded voltage is obtained in ascending order for comparison with the fourth voltage information. When the fourth voltage information is greater than the above-mentioned graded voltage, the on switch of the isolated power supply topology module corresponding to the graded voltage is disconnected to indicate that the topological voltage division is not performed through the transformer. When the fourth voltage information is not greater than the above-mentioned graded voltage, the conduction state of the conduction switch of the isolated power supply topology module corresponding to the graded voltage is maintained, and the difference between the fourth voltage information and the graded voltage of the next level of the graded voltage is calculated to update the fourth voltage information; for example, the fourth voltage information is 5, the current graded voltage is 8, and the graded voltage of the next level is 4. Since the fourth voltage information is less than the current graded voltage, at this time, the difference between the fourth voltage information and the graded voltage of the next level is calculated (5-4=1), and the fourth voltage information is updated to 1. Then, it is determined whether the fourth voltage information exceeds 0; if the fourth voltage information exceeds 0, it means that the isolated power supply needs to be continued to be configured for the power supply load, and the comparison step of the fourth voltage information and the graded voltage information sequence is continued; if the fourth voltage information does not exceed 0, it means that the isolated power supply configuration of the current power supply load is completed, and the isolated power supply is configured for the next power supply load.

[0065] It is worth mentioning that it also includes: Acquiring a second voltage information sequence; Calculating the differences between the elements of the first voltage sequence and the second voltage information sequence in sequence order to obtain a first difference sequence; Determining whether the first difference values ​​in the first difference value sequence are all greater than a preset difference value threshold; If so, the duty cycle parameter of the PWM chip is lowered.

[0066] It should be noted that the second voltage information is the power supply voltage value obtained by the power supply load; the second voltage information sequence is a voltage sequence composed of the second voltage information. In this embodiment, the operating parameters of the PWM chip are adjusted by the difference between the power supply value and the power demand value of the power supply load to achieve fine-tuning of the flyback voltage of the isolated power supply circuit, and the safety of the circuit operation is improved by lowering the voltage. When the difference between the power supply value and the power demand value of the power supply load is greater than the preset difference threshold, the effect of fine-tuning the flyback voltage of the isolated power supply circuit can be achieved by lowering the operating parameters of the PWM.

[0067] It is worth mentioning that it also includes: Acquiring first current information; Determining whether the first current information exceeds a preset current threshold; If so, the first topology analog switch of the first stage is turned off.

[0068] It should be noted that the first current information is the operating current of the flyback power module in the isolated power circuit. When the current is too high, there is a problem of burning the transistor in the flyback power module. Therefore, in this embodiment, the safety of the isolated power circuit is improved by monitoring the current.

[0069] It is worth mentioning that it also includes: Acquiring first current information; Obtaining first power information according to the first current information and the first input voltage information; Determining whether the first power information exceeds a preset power threshold; If so, the first input voltage information is lowered or the duty cycle parameter of the PWM chip is lowered.

[0070] It should be noted that the operating power of the isolated power supply circuit, i.e., the first power information, is calculated based on the operating current in the flyback power supply module and the input power supply voltage. In this embodiment, when the first power information exceeds the preset power threshold, the operating power of the isolated power supply circuit is controlled by reducing the input voltage or lowering the operating parameters of the PWM chip, thereby improving the safety of the isolated power supply circuit.

[0071] A third aspect of the present invention provides a computer-readable storage medium, which includes a control method program based on a flyback multi-stage isolated power supply. When the control method program based on a flyback multi-stage isolated power supply is executed by a processor, the steps of the control method based on a flyback multi-stage isolated power supply as described in any one of the above items are implemented.

[0072] In summary, the present invention provides a control method, system and storage medium based on a flyback multi-stage isolated power supply, which is applied to a flyback multi-stage isolated transistor driving power supply circuit, wherein the circuit generates multiple groups of isolated power supplies through a group of flyback power supply modules and at least two groups of isolated power supply topology modules, which greatly reduces the number of components used. The present invention can adjust the input power supply voltage of the flyback power supply module according to the total voltage required by the power supply load; and then control the conduction of the topological analog switch of the isolated power supply topology module according to the graded turns ratio of the isolated power supply topology module, so as to combine and output multiple isolated power supplies that meet the power supply voltage required by the power supply load; the present invention is applied to an isolation circuit with fewer core components to realize the output of multiple groups of isolated power supplies, thereby improving the integration and portability of the isolated power supply.

[0073] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control method based on a flyback multi-stage isolated power supply is applied to a flyback multi-stage isolated transistor drive power supply circuit, the circuit comprising: A set of flyback power supply modules and at least two sets of isolated power supply topology modules; The flyback power supply module uses a PWM chip as a flyback power supply, and then drives the power supply through at least one transistor, and is connected to the primary of the transformer; The isolated power supply topology module is a mutually isolated driving power supply composed of transformer secondary; Characterized in that the method comprises: Acquiring a first voltage information sequence; Determining first input voltage information according to the first voltage information sequence; Configure the power supply voltage of the flyback power supply module according to the first input voltage information; Determining a hierarchical voltage information sequence according to the first input voltage information; A first topology analog switch is switched according to the first voltage information sequence and the hierarchical voltage information sequence.

2. The control method based on the flyback multi-stage isolated power supply according to claim 1, characterized in that: The determining the first input voltage information according to the first voltage information sequence is specifically: Determining first boundary information and second boundary information according to the first voltage information sequence; According to the first boundary information, and in accordance with a preset voltage and calculation strategy, obtaining first voltage and information; Determining whether the first boundary information is greater than the second boundary information; If yes, setting the first input voltage information according to the first voltage and information; If not, calculating the average of the first boundary information and the second boundary information to obtain third boundary information; According to the third boundary information, and in accordance with a preset voltage and calculation strategy, a second voltage and information is obtained; Determining whether the second voltage and information are greater than the first voltage and information; If yes, setting the second boundary information according to the third boundary information; If not, the first boundary information is set according to the third boundary information, and the first voltage and information are updated according to the second voltage and information.

3. The control method based on the flyback multi-stage isolated power supply according to claim 2, characterized in that: The determining the first boundary information and the second boundary information according to the first voltage information sequence is specifically: determining second voltage information according to the first voltage information sequence; According to the second voltage information, setting the second boundary information; Obtaining a preset classification threshold; Calculating a ratio of the second voltage information to the classification threshold rounded down to obtain first ratio information; The first boundary information is set according to the first ratio information.

4. The control method based on flyback multi-stage isolated power supply according to claim 2, characterized in that: The voltage and calculation strategy are specifically: Obtaining first unit voltage information; Selecting the first voltage information in the first voltage information sequence in sequence according to a preset order; Calculate a rounded-up ratio of the first voltage information to the first unit voltage information to obtain second ratio information; Obtaining third voltage information according to the product of the second ratio information and the first unit voltage information; The third voltage information is accumulated sequentially to obtain voltage sum information.

5. The control method based on flyback multi-stage isolated power supply according to claim 1, characterized in that: The step of determining the hierarchical voltage information sequence according to the first input voltage information is specifically as follows: Obtaining first graded turns ratio information, first intermediate graded turns ratio information, second intermediate graded turns ratio information, and second graded turns ratio information; Determining first hierarchical voltage information according to first input voltage information and the first hierarchical turns ratio information; Determining first intermediate hierarchical voltage information according to the first hierarchical voltage information and the first intermediate hierarchical turns ratio information; determining second intermediate grading voltage information according to the first intermediate grading voltage information and the second intermediate grading turns ratio information; determining second grading voltage information according to the second intermediate grading voltage information and the second grading turns ratio information; A gradation voltage information sequence is obtained according to the first gradation voltage information, the first intermediate gradation voltage information, the second intermediate gradation voltage information and the second gradation voltage information.

6. The control method based on flyback multi-stage isolated power supply according to claim 5, characterized in that: The switching of the first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence is specifically: Sequentially extracting first voltage information in the first voltage information sequence to obtain fourth voltage information; According to the fourth voltage information, in accordance with a preset comparison order, the fourth voltage information is sequentially compared with the hierarchical voltages of the hierarchical voltage information sequence; Determining whether the fourth voltage information is greater than the classification voltage; If yes, disconnect the conduction switch of the isolated power supply topology module corresponding to the graded voltage; If not, calculating the difference between the fourth voltage information and the next level of the graded voltage of the graded voltage, and using it to update the fourth voltage information; Determining whether the fourth voltage information exceeds 0; If yes, continue to perform the step of comparing the fourth voltage information with the graded voltage information sequence; If not, the first voltage information in the first voltage information sequence is extracted to obtain the fourth voltage information until all the first voltage information in the first voltage information sequence is compared.

7. A control system based on a flyback multi-stage isolated power supply is applied to a flyback multi-stage isolated transistor drive power supply circuit, the circuit comprising: A set of flyback power supply modules and at least two sets of isolated power supply topology modules; The flyback power supply module uses a PWM chip as a flyback power supply, and then drives the power supply through at least one transistor, and is connected to the primary of the transformer; The isolated power supply topology module is a mutually isolated driving power supply composed of transformer secondary; The system comprises a memory and a processor, wherein the memory comprises a control method program based on a flyback multi-stage isolated power supply, and when the control method program based on a flyback multi-stage isolated power supply is executed by the processor, the following steps are implemented: Acquiring a first voltage information sequence; Determining first input voltage information according to the first voltage information sequence; Configure the power supply voltage of the flyback power supply module according to the first input voltage information; Determining a hierarchical voltage information sequence according to the first input voltage information; A first topology analog switch is switched according to the first voltage information sequence and the hierarchical voltage information sequence.

8. The control system based on flyback multi-level isolated power supply according to claim 7, characterized in that: The determining the first input voltage information according to the first voltage information sequence is specifically: Determining first boundary information and second boundary information according to the first voltage information sequence; According to the first boundary information, and in accordance with a preset voltage and calculation strategy, obtaining first voltage and information; Determining whether the first boundary information is greater than the second boundary information; If yes, setting the first input voltage information according to the first voltage and information; If not, calculating the average of the first boundary information and the second boundary information to obtain third boundary information; According to the third boundary information, and in accordance with a preset voltage and calculation strategy, a second voltage and information is obtained; Determining whether the second voltage and information are greater than the first voltage and information; If yes, setting the second boundary information according to the third boundary information; If not, the first boundary information is set according to the third boundary information, and the first voltage and information are updated according to the second voltage and information.

9. The control system based on flyback multi-level isolated power supply according to claim 7, characterized in that: The switching of the first topology analog switch according to the first voltage information sequence and the hierarchical voltage information sequence is specifically: Sequentially extracting first voltage information in the first voltage information sequence to obtain fourth voltage information; According to the fourth voltage information, in accordance with a preset comparison order, the fourth voltage information is sequentially compared with the hierarchical voltages of the hierarchical voltage information sequence; Determining whether the fourth voltage information is greater than the classification voltage; If yes, disconnect the conduction switch of the isolated power supply topology module corresponding to the graded voltage; If not, calculating the difference between the fourth voltage information and the next level of the graded voltage of the graded voltage, and using it to update the fourth voltage information; Determining whether the fourth voltage information exceeds 0; If yes, continue to perform the step of comparing the fourth voltage information with the graded voltage information sequence; If not, the first voltage information in the first voltage information sequence is extracted to obtain the fourth voltage information until all the first voltage information in the first voltage information sequence is compared.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer-readable storage medium includes a control method program based on a flyback-type multi-level isolated power supply. When the control method program based on a flyback-type multi-level isolated power supply is executed by a processor, the steps of the control method based on a flyback-type multi-level isolated power supply as described in any one of claims 1 to 6 are implemented.

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